Time and time again we’ve cautioned you against buying coffee pod machines like the Keurig, but what if one is gifted to you? Instead of just settling for bad coffee every morning, you can do what Evan Booth did and rebuild it into something else, like a functional robotic bionic hand.

Shotguns are not allowed through airport security. But what does that matter if you can build one from items purchased in an airport gift shop? The break-action shotgun pictured above was made from Red Bull cans, a hair dryer, batteries and a can of Axe body spray – and it can blast a handful of pocket change through…